Official Luthiers Forum!

I use 15 and 25 as well. (Because it was popular when I bought them)
I have noticed that with an OM it give you a slightly too steep neck angle.
28 would probably be better.   (Peter M's response)
Since the 25 give me a too steep angle, when I am done sanding the top
rim, I then lower the angle on the fretboard extension paddle of my neck
block to compensate.

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Andy Z.
http://www.lazydogguitars.com

Chris,
William Cumpiano fallows the same rule of thumb as most on this thred, 15' back and 25' top radi.
Lillian,
As Dave points out, it seems you can make a veriety of radi work for you, so long as you do some sort of radi.
The trick is to end up with a slight arch or dome to your top and back. This is supposed to add strength to the overall build.
Am I right Guys?

Wade

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Wade
Nashua, NH
http://www.wadefx.com

[QUOTE=Dave White]Not cylindrical. I put the arches on the bottom of the braces and glue them to the top and back in a go-bar deck using cork shims around the sides [/QUOTE]
Thanks, Dave. Have you ever seen inside a Sobell? Do you know if he takes a similar approach?

Calton,

I'm fortunate that a lot of my friends have Sobells and have let me have a good "rummage around". Stefan largely uses ladder bracing for his backs which give the cylindrical arch. Best bet is to look on his website under the News page where he shows various aspects of his building.

Howard Klepper also I think uses a cylindrical and there is lots of good stuff on his website.

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Dave White
De Faoite Stringed Instruments
". . . the one thing a machine just can't do is give you character and personalities and sometimes that comes with flaws, but it always comes with humanity" Monty Don talking about hand weaving, "Mastercrafts", Weaving, BBC March 2010

Thanks again, Dave.